static GObject*
base_object_constructor  (GType                  type,
			  guint                  n_construct_properties,
			  GObjectConstructParam *construct_properties)
{
  /* The constructor is the one place where a GParamSpecOverride is visible
   * to the outside world, so we do a bunch of checks here
   */
  GValue value1 = { 0, };
  GValue value2 = { 0, };
  GParamSpec *pspec;

  g_assert (n_construct_properties == 1);

  pspec = construct_properties->pspec;

  /* Check we got the param spec we expected
   */
  g_assert (G_IS_PARAM_SPEC_OVERRIDE (pspec));
  g_assert (pspec->param_id == BASE_PROP1);
  g_assert (strcmp (g_param_spec_get_name (pspec), "prop1") == 0);
  g_assert (g_param_spec_get_redirect_target (pspec) == iface_spec1);

  /* Test redirection of the nick and blurb to the redirect target
   */
  g_assert (strcmp (g_param_spec_get_nick (pspec), "Prop1") == 0);
  g_assert (strcmp (g_param_spec_get_blurb (pspec), "Property 1") == 0);

  /* Test forwarding of the various GParamSpec methods to the redirect target
   */
  g_value_init (&value1, G_TYPE_INT);
  g_value_init (&value2, G_TYPE_INT);
  
  g_param_value_set_default (pspec, &value1);
  g_assert (g_value_get_int (&value1) == 42);

  g_value_reset (&value1);
  g_value_set_int (&value1, 0x10000);
  g_assert (g_param_value_validate (pspec, &value1));
  g_assert (g_value_get_int (&value1) == 0xFFFF);
  g_assert (!g_param_value_validate (pspec, &value1));
  
  g_value_reset (&value1);
  g_value_set_int (&value1, 1);
  g_value_set_int (&value2, 2);
  g_assert (g_param_values_cmp (pspec, &value1, &value2) < 0);
  g_assert (g_param_values_cmp (pspec, &value2, &value1) > 0);
  
  g_value_unset (&value1);
  g_value_unset (&value2);

  return base_parent_class->constructor (type,
					 n_construct_properties,
					 construct_properties);
}
static inline void
g_object_notify_queue_add (GObject            *object,
			   GObjectNotifyQueue *nqueue,
			   GParamSpec	      *pspec)
{
  if (pspec->flags & G_PARAM_READABLE)
    {
      GParamSpec *redirect;

      g_return_if_fail (nqueue->n_pspecs < 65535);

      redirect = g_param_spec_get_redirect_target (pspec);
      if (redirect)
	pspec = redirect;
	    
      /* we do the deduping in _thaw */
      nqueue->pspecs = g_slist_prepend (nqueue->pspecs, pspec);
      nqueue->n_pspecs++;
    }
}